Titre du document

Proposal for a constant cosmological constant

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Nom du Corpus

AstroConcepts

Auteur(s)
  • Haim Goldberg
Affiliation(s)
  • Department of Physics, Northeastern University, Boston, MA 02115, USA
Résumé

It is proposed that the apparent positive acceleration of the cosmological scale factor is due to the vacuum energy of an incomplete chiral phase transition in a hidden SU(2) sector. Constraints from primordial nucleosynthesis imply that the present metastable phase is in a substantially supercooled state. It is argued that massless chiral condensates can substantially enhance the possibility of supercooling, and a linear sigma model exhibiting scale invariance broken only at the quantum level is shown to accommodate the required supercooling with a reasonable choice of quartic couplings. The extensive supercooling can in principle be confirmed or rejected on the basis of interface tension measurements in lattice simulations with dynamical fermions.

Langue(s) du document
Anglais
Année de publication
2000
Revue

Physics Letters B

Éditeur
Elsevier
Type de publication
journal
Type de document
brief-communication
Présence de XML structuré
Oui
Version de PDF
1.2
Score de qualité du texte
7.467
Nom du concept
  • Dark energy
Mots-clés d’auteur
  • Phenomenology
Catégories Science-Metrix
  • 1 - natural sciences ; 2 - physics & astronomy ; 3 - nuclear & particles physics
Catégories Inist
  • 1 - sciences appliquees, technologies et medecines ; 2 - sciences exactes et technologie ; 3 - terre, ocean, espace ; 4 - astronomie
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Physics and Astronomy ; 3 - Nuclear and High Energy Physics
Catégories WoS
  • 1 - science ; 2 - physics, multidisciplinary
Identifiant ISTEX
5112E56B63FE62B30DA17A62E4145CA310AD77F4
ark:/67375/6H6-89VQBW5L-S
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